请举例子

以下是Java Socket异步非阻塞方式读取数据的示例：

Selector selector = Selector.open();
SocketChannel channel = SocketChannel.open(new InetSocketAddress("127.0.0.1", 8080));
channel.configureBlocking(false);
channel.register(selector, SelectionKey.OP_READ);

while (true) {
    int readyChannels = selector.select();
    if (readyChannels == 0) {
        continue;
    }

    Set<SelectionKey> selectedKeys = selector.selectedKeys();
    Iterator<SelectionKey> keyIterator = selectedKeys.iterator();

    while (keyIterator.hasNext()) {
        SelectionKey key = keyIterator.next();

        if (key.isReadable()) {
            SocketChannel socketChannel = (SocketChannel) key.channel();
            ByteBuffer buffer = ByteBuffer.allocate(1024);
            int bytesRead = socketChannel.read(buffer);

            if (bytesRead == -1) {
                // 连接已经关闭
                socketChannel.close();
                key.cancel();
            } else {
                // 处理读取到的数据
                String data = new String(buffer.array()).trim();
                System.out.println("Received data: " + data);
            }
        }

        keyIterator.remove();
    }
}

这里采用了Java NIO中的Selector和SocketChannel来进行Socket编程，使用异步非阻塞方式读取数据，当连接中断时，不会因为阻塞在输入流上而导致异常。在读取数据时，先判断是否读到了-1，如果读到了则表示连接已经关闭，需要及时关闭Socket和Channel等资源。